Benthic macroinvertebrates are sampled in streams and rivers as one of the assessment elements of the US Environmental Protection Agency's National Rivers and Streams Assessment. In a 2006 report, the recommendation was made that different yet comparable methods be evaluated for different types of streams (e.g., low gradient vs. high gradient). Consequently, a research element was added to the ...

Abstract The strong sea‐surface temperature (SST) gradient associated with the Gulf Stream (GS) is widely acknowledged to play an important role in shaping mid‐latitude weather and climate. Despite this, index for GS SST has not yet been standardized literature. This paper introduces a monthly large‐scale across separated based on time‐varying position detected from height. Analysis suggests th...

Surveys in the lower Mokelumne River during 1994-1995 indicated that fall-run chinook salmon, Oncorhynchus tshawytscha, redds associated with woody debris (WD) had smaller substrate and greater mean depths. Also, the proportion of redds associated with WD was negatively related to stream gradient. Female chinook salmon selected spawning sites containing WD in some instances. Woody debris may ma...

We study the processes of particle acceleration which take place in the field of a rotating black hole as part of a mechanism of formation of galactic jets within the first parsec from the central source, where gravitation is supposed to be dominant. We find the Lorentz factor that a stream of particles acquires as function of distance, when the orbital parameters vary slightly due to a local e...

Terrestrial predators have been shown to aggregate along stream margins during periods when the emergence of adult aquatic insects is high. Such aggregation may be especially evident when terrestrial surroundings are relatively unproductive, and there are steep productivity gradients across riparia. In tropical forests, however, the productivity of inland terrestrial habitats may decrease the r...

We use six years of data from the Dark Energy Survey to perform a detailed photometric characterization Phoenix stellar stream, 15-degree long, thin, dynamically cold, low-metallicity system in southern hemisphere. natural splines, non-parametric modeling technique, simultaneously fit stream track, width, and linear density. This updated model allows us improve measurements heliocentric distanc...

In medical filed, predicting the occurrence of heart diseases is a significant piece work. Millions healthcare-related complexities that have remained unsolved up until now can be greatly simplified with help machine learning. The proposed study concerned cardiac disease diagnosis decision support system. An OpenML repository data stream 1 million instances and 14 features used for this study. ...

A new approach has been presented in the paper to optimize the longitudinal gradient coil performance. First, traditional spherical harmonic target field method is deduced, the relation between the magnetic field and the current distribution is described by a matrix equation. Then, simulated annealing method is introduced to the optimization procedure, and those high order coefficients which ar...

Climate change and anthropogenic activities are altering the body sizes of fishes, yet our understanding factors influencing size for many taxa remains incomplete. We evaluated relationships between climate, environmental, landscape attributes different freshwater trout (Salmonidae) in USA. Hierarchical spatial modeling across a gradient habitats (5221 sites) illustrated importance watershed ef...

Coupled production between algae and bacteria in stream epilithon was assessed along a nutrient-enrichment gradient in 8 Texas streams with open canopies. Photosynthesis (PS) and bacterial biomass production (BBP) were measured simultaneously using a dual-label radioassay (C-HCO3 – uptake and H-L-leucine incorporation into protein) on multiple samples within a stream reach. PS and BBP were meas...